The Momcozy Flange Insert 19mm for M5 Wearable Breast Pump is a soft silicone replacement accessory designed to improve pumping comfort and efficiency by ensuring a better nipple fit inside the pump tunnel. It is specifically made for the Momcozy M5 breast pump system and helps optimize suction performance while reducing friction, pain, and milk leakage. Made from BPA-free, food-grade silicone, the insert is safe for daily use, gentle on sensitive skin, and easy to clean. It is an essential size-adjustment accessory for mothers who need a more precise fit during pumping sessions.